Academic literature on the topic 'Tectona grandis (Teak)'
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Journal articles on the topic "Tectona grandis (Teak)"
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Wahounou, PJ, B. Coulibaly, GP Gnonhouri, and A. Adiko. "TEAK (TECTONA GRANDIS) DECAY ASSOCIATED WITH." JOURNAL OF TROPICAL FOREST SECIENCE 29, no. 3 (2017): 363–70. http://dx.doi.org/10.26525/jtfs2017.29.3.363370.
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DOILOM, MINGKWAN, LUCAS A. SHUTTLEWORTH, JOLANDA ROUX, EKACHAI CHUKEATIROTE, and KEVIN D. HYDE. "Botryosphaeriaceae associated with Tectona grandis (teak) in Northern Thailand." Phytotaxa 233, no. 1 (2015): 1. http://dx.doi.org/10.11646/phytotaxa.233.1.1.
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Tectona grandis (teak) is one of the most important economic timbers worldwide. Limited studies exist on the potential pathogens of these trees. Fungi in the Botryosphaeriaceae are cosmopolitan opportunistic pathogens, endophytes and saprobes of numerous hosts. Both symptomatic and asymptomatic branch and stem sections, as well as leaves were collected from T. grandis in plantations and forests in four provinces of northern Thailand with the aim of identifying species of Botryosphaeriaceae associated with these trees. Morphology and multi-locus phylogenies (ITS, TEF1-α, β-tubulin) were used to identify the Botryosphaeriaceae species. Six species from four different genera were found on T. grandis in Northern Thailand. These included Dothiorella tectonae sp. nov., Lasiodiplodia brasiliense, L. pseudotheobromae, L. theobromae, Pseudofusicoccum adansoniae and Sphaeropsis eucalypticola. Dothiorella tectonae is introduced here as a novel species and compared with other species in the genus. Dothiorella tectonae, L. brasiliense, L. pseudotheobromae, L. theobromae, P. adansoniae and S. eucalypticola are first reports for T. grandis in Thailand. Variations in morphology between descriptions of previously described species and that obtained in this study are described to facilitate future identification of species.
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Renvillia, Rega, Afif Bintoro, and Melya Riniarti. "Penggunaan Air Kelapa Untuk Setek Batang Jati (Tectona Grandis)." Jurnal Sylva Lestari 4, no. 1 (2016): 61. http://dx.doi.org/10.23960/jsl1461-68.
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Teak plant wasa treewhich timber has durability classI and strong class I. It hasmany benefits, from roots to leaves. Variousbenefits of teak causing to do cultivation, one of propagation activities that often carried out was vegetative. Vegetative propagation of plants can be done bystem cutting, root cutting and shoot cutting. Using of growth regulator with coconut water immersion is expected to spur the growth rootofteak stem cutting. This study aimed to determine the effect of using coconut water to increase the success of teak stem cuttinggrowth, andto determine the best dose of using coconut water forteak stem cutting growth. This treatment used Completely Randomized Design(CRD). This research consisted of five treatments that usedcoconut water treatment 0%, 25%, 50%, 75%, and 100%. Each treatmentconsisted of five teak stem cuttings with repetition as much as 5 times. Amount ofmaterial plants required 5 x 5 x 5 = 125 teak stem cuttings. The resultshowed by using coconut wateras a growth regulator could increasethe growth of teak (Tectona grandis) stem cuttingin 50%--100% concentration and the best dose of coconut water asa growth regulator was 100%. Keywords : coconut water, cutting, dose, growth regulator, teak
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Jibkate, Nilisha, Dipika Ayate, and VV Ujjainkar. "Genetic variability studies in teak (Tectona grandis L)." International Journal of Farm Sciences 8, no. 1 (2018): 107. http://dx.doi.org/10.5958/2250-0499.2018.00026.5.
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Cintamulya, Imas. "SCREENING OF RAPD PRIMER FOR TEAK (Tectona grandis)." Berkala Penelitian Hayati 21, no. 1 (2015): 46–50. http://dx.doi.org/10.23869/bphjbr.21.1.20159.
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Doilom, Mingkwan, Asha J. Dissanayake, Dhanushka N. Wanasinghe, et al. "Microfungi on Tectona grandis (teak) in Northern Thailand." Fungal Diversity 82, no. 1 (2016): 107–82. http://dx.doi.org/10.1007/s13225-016-0368-7.
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Kertadikara, A. W. S., and D. Prat. "Isozyme variation among teak (Tectona grandis L.f.) provenances." Theoretical and Applied Genetics 90, no. 6 (1995): 803–10. http://dx.doi.org/10.1007/bf00222015.
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Damayanti, Ratih, Krisdianto Krisdianto, Jugo Ilic, Gustan Pari, Peter Vinden, and Barbara Ozarska. "Wood Permeability Assessment of Young Teak (Tectona grandis L.f.)." Wood Research Journal 11, no. 2 (2021): 41–47. http://dx.doi.org/10.51850/wrj.2020.11.2.41-47.
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Wood properties of young teak (Tectona grandis L.f.) is inferior, and then preservative treatment is one possible solution to enhance its service life. The uptake and movement of preservatives through wood cell structure is directly connected to the wood permeability. There are two simple methods to identify wood permeability: water soaking and bubble test methods. This paper assesses the young teak permeability by water soaking and bubble test methods. The assessment was conducted into five cm thick young-teak discs by soaking in the red-dye water and blowing air into the discs which had been coated with soap. Results show that the heartwood is less permeable than sapwood. Red-dye penetrates almost 100% of the sapwood area, and the red-dye did not penetrate in the heartwood. Red-dye only penetrates in the cracked heartwood through the void volume in the cracking heartwood. There is a transition zone between sapwood and heartwood, and it is refractory. Bubble test with air pressure from compressor could open the air-pathway in the heartwood and sapwood of young-teak discs taken from Bogor. The bubble test result of young-teak discs from Madiun showed air-pathway only in the sapwood, but heartwood. The air pressure is not capable of moving the vapour through the wood cell. It indicates that the heartwood of young-teak from Madiun is less permeable and less possibility for pressure treatment.
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Lestari, Puji, Ridla Arifriana, and Handojo Hadi Nurjanto. "Responds of Superior Teak (Tectona grandis) on Different Sulphur Concentrations." Jurnal Sylva Lestari 7, no. 2 (2019): 128. http://dx.doi.org/10.23960/jsl27128-138.
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The tree improvement program has invented superior teak with an ability to improve its productivity. Yet the information about basic nutrient requirement of superior teak is less known. This study aimed to determine the optimal concentration of sulfur for the best growth of superior teak seedling and to identify the morphological symptoms of teak seedlings affected by several concentration levels of S. This study was conducted at a nursery on six months old teak seedlings. The experimental design was Completely Randomized Design (CRD) with four different solution treatments with three replication each. The treatments are K (control, aqua dest does not contain nutrients), S0 (solution contains nutrients except sulfur), S1 (solution contains nutrients with 0,5 full strength of S), and S2 (solution contains nutrients with full strength of S). Each treatment was replicated 3 times. Parameter observed included the height of seedling, the diameter of seedling, the nodal distance of seedling, the number of leaves, size of leaves and morphological symptoms of leaf. The results showed that at a concentration of nitrogen (N), phosphor (P), potassium (K), calcium (Ca), and magnesium (Mg) in full strength level, superior teak seedling which treated by S1 (S concentration of 421 ppm) resulted in the best growth. However, the morphology of teak leaves in all treatment showed abnormal.Keywords: growth, morphology, sulfur, superior teak
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DOILOM, MINGKWAN, LUCAS A. SHUTTLEWORTH, JOLANDA ROUX, EKACHAI CHUKEATIROTE, and HYDE D. KEVIN. "Barriopsis tectonae sp. nov. a new species of Botryosphaeriaceae from Tectona grandis (teak) in Thailand." Phytotaxa 176, no. 1 (2014): 81. http://dx.doi.org/10.11646/phytotaxa.176.1.10.
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Tectona grandis (teak) is an increasingly important timber resource globally. It is native to Asia, including Thailand. In this paper a new species of Barriopsis, B. tectonae sp. nov., is described from a dead T. grandis branch collected in Thailand. Barriopsis tectonae can be differentiated from the two previously described species of Barriopsis; B. fusca and B. iraniana, by its ascospore and conidial dimensions. Phylogenetic evaluation of the ITS, TEF1-α and BT genomic regions provide further evidence that B. tectonae is a novel species.
Dissertations / Theses on the topic "Tectona grandis (Teak)"
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Mekkamol, Sureewan. "Endophytic fungi of Tectona grandis L. (Teak)." Thesis, Liverpool John Moores University, 1998. http://researchonline.ljmu.ac.uk/5030/.
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Taxonomic diversity, biology and ecological aspects of fungal endophytes of Tectona grandis (teak) from Chiang Mai Province, Thailand were investigated. It was found that the endophyte assemblages of mature leaves sampled from natural forest and plantation teak were not significantly different. Members of the Xylariaceae, especially Daldinia eschscholzii, Nemania subannulata, Hypoxylon haematostroma and Xylaria cubensis were frequent isolates. Widely reported endophytic fungi such as Phomopsis, Colletotrichum, Cladosporium and Fusarium were also isolated. There is little evidence to support host specificity for the majority of the isolates. Differences in endophyte assemblages between young and mature leaves were shown to occur with a much lower infection percentage in the young leaves. Species of Phomopsis and Colletotrichum were dominant in the young leaves but members of the Xylariaceae dominated in mature leaves. This pattern was the same for both natural forest and plantation samples. However comparison of taxa isolated from leaf lamina, midrib and veins gave conflicting results. Samples from mature leaves from natural forest trees exhibited little variation with greater variation in taxa recovered being found to occur between sampling years than between position of isolation from the leaf. In plantation leaves, although the results were similar to those from natural forest tree leaves for two of the years sampled, in 1997 the overall recovery rate was highest for the lamina, followed by veins and then the midrib. There was no evidence obtained to link individual taxa with specific regions of the leaf. It is now possible to devise a sampling strategy to obtain suitable diversity of endophytic isolates from teak leaves for industrial screening of these fungi. Techniques were developed to overcome current problems of identification of xylariaceous endophytes in the absence of their teleomorph. Inoculation of suitable woody substrata combined with selective incubation was used to induce teleomorph formation in many of the isolates and this together with chemical profiling enabled identification to species of many of these isolates. Rates of development of specific species were obtained and differences in environmental conditions necessary for development of teleomorphs to maturity were noted for members of different genera. Thus species of Daldinia and Hypoxylon required drier conditions than species of Xylaria and Nemania which only developed under wet shaded conditions. Xylariaceae from the natural forest, plantation, and forest surrounding the plantation were surveyed and a number of the Xylariaceae recovered as endophytes were found to be new to science, new records for Thailand or were recorded as endophytes for the first time.
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Kraenzel, Margaret. "Carbon storage of Panamanian harvest-age teak (Tectona grandis) plantations." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=31249.
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Reforestation is being considered as a mitigation option to help combat the climate change predicted to result from atmospheric carbon dioxide pollution. Forestry-based carbon storage projects are being introduced in many tropical countries, and assessment of species-specific carbon storage potentials is made difficult by a lack of species-level information. This study focuses on teak (Tectona grandis), to measure many of the characteristics affecting the carbon storage potential both of the trees themselves and of the plantations they are in. Root-to-shoot ratio, above- and belowground biomass, as well as tissue carbon content were measured in 20-year-old teak trees in Panamanian plantations. A regression relating diameter at breast height (DBH) to total tree carbon storage for trees of various sizes was developed. To scale up to the plantation level, this regression was used to estimate the carbon storage of the trees of four plantations. Litter, undergrowth, and soil were studied to estimate carbon storage in these compartments. These estimates were collated to form a global estimate of carbon storage in Panamanian harvest age teak plantations. Various methods of calculation of carbon storage in short-rotation plantations are discussed. This work will allow greater precision in the assessment of carbon storage in individual plantations.
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Nunifu, Thompson K. Fq(Thompson Kwaku). "The growth and yield of teak (Tectona grandis Linn F.) plantations in northern Ghana." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ33423.pdf.
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Ombina, Christian Ahmed. "Soil characterisation for teak (Tectona grandis) plantations in the Nzara district of Southern Sudan." Thesis, Stellenbosch : Stellenbosch University, 2008. http://hdl.handle.net/10019.1/2260.
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Thesis (MScFor (Forest and Wood Science))--Stellenbosch University, 2008.<br>The characterization of soils in Nzara District of Southern Sudan in comparison to other tropical
teak growing countries (Tectona grandis) – in respect of extensions to existing and/or the
establishment of new teak plantations – were done by firstly considering the soils of three
existing plantations: Yoboa, Mabarizinga and Nagondi, and secondly by considering soils
outside and inside the existing teak plantations in respect of land uses. From these soil
characterizations, it emerged that considerable positive returns can be expected from teak
plantings in the area as an investment, provided that appropriate site management is
implemented.
Climatic data of the Nzara area compared favorably with the climatic range of areas where teak
grows naturally and the world’s dominant producers: mean annual rainfall 1350-1600 mm with a
distribution over 6-8 months compares well with that of Myanmar (1250-3750 mm) and
Indonesia (1511-2108 mm) both with at least 3 months of dry season. The mean annual
temperature of 28-350C compares well with 15-410C and 30-320C of Myanmar and Indonesia
respectively.
The Yoboa and Mabarizinga sites should be prioritized as they appear slightly more suitable than
the Nagondi site. All three sites have a dominant soil texture of Sandy Clay Loam similar to
Sandy Loam of most areas of other tropical countries where teak is growing well (such as India,
Indonesia and Nigeria). Yoboa and Mabarizinga however distinguish themselves by having the
highest soil pHwater values range from 6.4±0.56 and 6.04±0.7 in top soils; 5.91±0.5 and
5.46±0.61 in subsoils at Yoboa and Mabarizinga respectively; the highest soil organic matter
content 1.8±0.34% and 1.92±0.43% in topsoil 0.89±0.16% and 1.13±0.19% in subsoils; as well
as the highest P content in both available (0.09±0.04% and 0.03±0.04% for topsoils) and total
forms (1.19±0.26% and 0.9±0.3% also on topsoils). These values though very low in absolute
terms, are not much different from those of other tropical teak-growing countries. Management
strategies intended to preserve and improve the present status, particularly the protection of top
soil horizons against mainly water erosion, would be able to boost the site productivity.
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Guimarães, Mariana Abdalla Prata. "Cultivo de Tectona grandis L.f. no Estado do Espírito Santo." Universidade Federal do Espírito Santo, 2012. http://repositorio.ufes.br/handle/10/5821.
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Previous issue date: 2012-10-03<br>The objective was to create a map of zoning edaphoclimatic for teak in Espírito Santo, characterize six teak stands in southern Espírito Santo, and evaluate the genetic variability in progenies of Tectona grandis Lf in the municipality of Alegre, state of Espírito Santo. The work was divided into three chapters. At first, we used the fuzzy logic, in the desktop ArcGIS 9.2/ArcMap®, from time series of accumulated rainfall annual average, air temperature, water deficit accumulated annual and texture of soils. From the IDW and Reclass tool were generated maps of each factor, considering the indexes for teak. By overlaying these maps, we obtained the map of zoning edaphoclimatic. The southern and south central coastal showed aptitude for the cultivation of the species. The western region was classified as suitable restriction, because of the had rocky outcrops, but were masked by the methodology. The mountainous and north regions were classified as able-restricted, due to water factors. In the second chapter, we evaluated six teak stands in the municipalities of Cachoeiro de Itapemirim, Muqui and Mimoso do Sul. The stands were divided in plots of 9,0 m x 12,0 m, and evaluated 6 plots in each stand, randomly selected, noting the variables: total height, merchantable height, circumference, attack of pests and diseases and the presence of thick branches and twisting on the shaft. The stands of the region are small, and showed low values to characteristics evaluated, despite being located in areas suitable for the cultivation of the species. In the third chapter, it was used as treatment 50 progenies of half-brothers teak, established in a randomized block design, spaced 3,0 m x 2,0 m. The monitoring was conducted at 6 and 12 months after planting, where it was evaluated: i) the diameter of the stem base, ii) total height and iii) survival. The variables were analyzed using the methodology of mixed linear model univariate and multivariate, through of the SELEGEN-REML/BLUP and Genes programs. There was low correlation and low genetic variability for all characters at 6 and 12 months, which can be attributed to genetic basis restricted, to the soil used in the experiment or the age of the plants. The progenies 15, 20, 21 and 41 were higher in Medium-Rank for all traits<br>O objetivo do trabalho foi gerar um mapa de zoneamento edafoclimático para teca no Estado do Espírito Santo, caracterizar seis povoamentos de teca no sul do Espírito Santo, e avaliar a variabilidade genética em progênies de Tectona grandis L.f. no município de Alegre, Estado do Espírito Santo. O trabalho foi dividido em três capítulos. No primeiro, utilizou-se a lógica Fuzzy, no ambiente de trabalho ArcGis 9.2/ArcMap®, a partir de informações de série história de precipitação acumulada anual, temperatura média do ar, déficit hídrico acumulado anual e textura dos solos. A partir da ferramenta IDW e Reclass geraram-se os mapas de cada fator, considerando os índices para teca. Através da sobreposição desses mapas, obteve-se o mapa de zoneamento edafoclimático. A região sul e o litoral centro-sul apresentaram aptidão ao cultivo da espécie. A região oeste foi classificada como apta com restrição, porém apresentou afloramentos rochosos, que foram mascarados pela metodologia. As regiões norte e serrana foram classificadas como apta com restrição, devido a fatores hídricos. No segundo capítulo, avaliou-se 6 povoamentos de teca nos municípios de Cachoeiro de Itapemirim, Muqui e Mimoso do Sul. Realizou-se a divisão dos povoamentos em parcelas de 9,0 m x 12,0 m, onde se avaliou 6 parcelas em cada povoamento, sorteadas ao acaso, anotando-se as variáveis: altura total, altura comercial, circunferência, ataque de pragas e doenças e presença de tortuosidades e galhos grossos no fuste. Os povoamentos da região são pequenos, e apresentaram médias baixas para as características avaliadas, mesmo estando localizadas em áreas aptas ao cultivo da espécie. Para o terceiro capítulo, utilizou-se como tratamento 50 progênies de meio-irmãos de teca, estabelecidas sob delineamento em blocos casualizados, no espaçamento 3,0 m x 2,0 m. O monitoramento foi realizado aos 6 e 12 meses após o plantio, onde avaliaram-se: i) diâmetro da base do caule; ii) altura total das plantas; e iii) sobrevivência. As variáveis foram analisadas usando-se a metodologia de modelo linear misto uni e multivariado, com os programas SELEGEN-REML/BLUP e Genes. Verificou-se baixa variabilidade genética e correlação para todos os caracteres aos 6 e 12 meses, que pode ser atribuída à restrita base genética, à localização do experimento ou à idade das plantas. As progênies 15, 20, 21 e 41 foram superiores no Rank-Médio para todos os caracteres avaliados
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Baptista, Isabel Alexandra Marques. "Caracterização da casca da teca (Tectona grandis L.f) como potencial fonte de produtos de valor acrescentado." Master's thesis, ISA/UL, 2015. http://hdl.handle.net/10400.5/9228.
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Mestrado em Engenharia Florestal e dos Recursos Naturais - Instituto Superior de Agronomia<br>The anatomical and chemical characterization of the bark of mature trees of Tectona grandis from East Timor was made as well as its fractionation and fraction characterization.
Teak bark is composed of secondary phloem, a thin layer of periderm cells and a narrow rhytidome. The phloem showed an orderly stratification with tangential bands of fibres in concentric rings alternating with thin bands of axial parenchyma and sieve tube elements. The bark fractured easily into clean particles, yielding low fines with 64.4% of the particles over 2 mm.
The mean chemical composition of teak bark was: ash 18.5% (mainly calcium representing 93% of the total), total extractives 12.4% (2.2% non-polar and 10.2% polar compounds), lignin 19.8% and suberin 2.0%. The polysaccharides, corresponding to approximately 47%, are predominantly glucose (60.3% of total neutral monosaccharides) and xylose (20.3%). The content of rhamnose was also comparatively high (5.1%).
Extractives were higher in the fines, about 30% more than in the coarse fraction. Lignin content and monosaccharide composition were similar in the different bark fractions. A difference between fractions was found for suberin content which was lower in the fines: 0.6% and 3.5% in the fine and medium fractions, respectively
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Niamké, Florence Bobolé. "Recherche des déterminants biochimiques de la durabilité naturelle du bois de teck (Tectona grandis)." Thesis, Montpellier 2, 2010. http://www.theses.fr/2010MON20046.
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La durabilité du bois de teck (Tectona grandis) est une propriété pouvant varier selon le génotype et les facteurs environnementaux. Chez le teck, le degré d'implication des extractibles dans la durabilité naturelle est controversé. A partir d'une approche quantitative incluant les aspects biologiques et technologiques conduites sur des échantillons de bois séchés à l'air ambiant, cette thèse s'est attachée à rechercher les déterminants chimiques de nature phénolique de la durabilité naturelle. Nous avons tout d'abord mis en évidence que les formes osidiques stockées dans l'aubier sont transformées en extractibles de nature quinonique. Nous avons ainsi caractérisé deux composés, l'un dans l'aubier le forsythoside B, un trisaccharide de l'acide caféique et l'autre dans le duramen, le 4',5'-dihydroxy-épiisocatalponol qui ont été identifiés pour la première fois dans le bois de teck. Nous avons mis en évidence que le second composé inhibe la croissance de Trametes versicolor indiquant son rôle directe dans la propriété de durabilité naturelle du bois de teck. Ainsi, les composés du métabolisme des naphthoquinones sont les plus impliqués dans la durabilité naturelle du bois de teck à l'égard de Trametes versicolor et de Poria placenta. Les mécanismes de transformation des sucres pourraient indiquer le niveau de durabilité naturelle des espèces. Ces nouvelles données contribueront aussi à l'amélioration de la qualité du bois qui par ailleurs assure la pérennité des arbres<br>Teak (Tectona grandis) wood natural durability is a property which can vary with genotype and environmental factors. The implication of quinonic extractives in the property of natural durability is controversial. Using a quantitative approach including biological and technological conducted on air-dried wood samples, this thesis aimed to search chemical attributes of natural durability. We first demonstrated that osidic forms stored in the sapwood were transformed into quinone derivative. We have characterized two compounds the forsythoside B, a trisaccharide of cafeic acid in the sapwood and in the heartwood, the 4',5'-dihydroxy(epi)isocatalponol that were identified for the first time in teakwood. The latter compound exhibited strong fungicidal activity against Trametes versicolor indicating that its direct implication in decay resistance of teak wood. We have shown that compounds from naphthoquinones metabolism were involved in decay resistance of teak wood against Trametes versicolor and Poria placenta. The mechanisms of sugars transformation may indicate the natural durability level of sustainable species. There these new data will contribute to improve the wood quality that ensures the perennity of trees
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Nery, Felipe Uassurê. "Otimização do crescimento e desenvolvimento de teca (Tectona grandis Linn f.) in vitro." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/11/11150/tde-14022012-111053/.
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O crescente aumento no uso da micropropagação de teca como forma de produção de clones com qualidades genotípicas e fenotípicas selecionadas a partir de árvores de elite, determinou a importância desse método, pois origina plantações com maior qualidade e uniformidade, agregando maior valor ao preço da madeira no mercado. O uso de sementes para a obtenção de mudas é uma técnica menos onerosa, porém resulta em plantas com tamanhos desiguais e não há um padrão na qualidade da madeira, essa técnica depende também da época de produção de sementes e, portanto é restrita a um período do ano. A micropropagação permite a clonagem em larga escala das árvores de elite em tempo e espaço reduzidos, podendo ser realizada em qualquer época do ano, além disso, permite a formação de mudas totalmente livres de pragas e patógenos. Faz-se necessário, maiores estudos com meio de cultura para Tectona grandis, pois os materiais relacionados a esse assunto são escassos. Para que a técnica do cultivo in vitro da teca seja incrementada, objetivou-se nesse experimento, otimizar o crescimento dos explantes de três clones diferentes, testando a eficiência de 6 meios de cultura com diferentes formulações nutricionais e constatar qual deles apresenta a melhor resposta para cada clone. O estudo contou com 6 tratamentos (MS, Básico, M1, M2, M3 e M4), durante oito épocas de avaliação (0, 7, 14, 21, 28, 35, 42 e 49 dias), para três clones de Tectona grandis (61, 62 e 68), com três repetições por tratamento/clone, utilizando o delineamento experimental inteiramente casualizado. A avaliação do crescimento foi feita por meio do peso de matéria fresca (PMF), matéria seca (PMS) e a taxa de crescimento relativo (TCR) proporcionado pelos meios. O PMF foi usado para obtenção do PMS e cálculo da TCR. Baseado nos valores do PMS obtidos, para o clone 61, constatou-se a formulação do meio Básico (PMS = 0,38 g), como a mais eficiente. Para o clone 62, o meio mais responsivo foi M4 (PMS = 0,47 g) e no clone 68, destacou-se o meio M3 (PMS = 0,71 g). Quanto a TCR, não foi encontrada diferença estatística significativa para nenhum dos 6 meios de cultura levando-se em conta os três clones.<br>The increasing use of teak micropropagation as a way of producing clones with genotypic and phenotypic qualities selected from elite trees, established the importance of this method, it leads to higher crop quality and consistency, adding more value to the price of wood business. The use of seeds to obtain seedlings has a less cost, but it results in plants with unequal sizes and wood quality without a pattern. This technique also depends on the time of seed production and therefore is restricted to a year period. Micropropagation allows cloning elite trees in large-scale and reduced time and space. It can be performed at any time of year, in addition, allows the formation of plants totally free of pests and pathogens. It is necessary more studies with culture medium for Tectona grandis, because the materials related to this subject are scarce. To increase the technique of teak in vitro cultivation, this experiment aimed to optimize the growth and development of explants from three different clones, testing the effectiveness of six culture media with different nutritional formulations and find which one offers the best answer to each clone. The study included six treatments (MS, Basic, M1, M2, M3 and M4) for eight periods (0, 7, 14, 21, 28, 35, 42 and 49 days) for three clones of Tectona grandis (61, 62 and 68) with three replicates per treatment/clone, in a randomized experimental design. The growth assessment was performed by the fresh matter weight (FMW), dry matter weight (DMW) and relative growth rate (RGR) provided by the media. The FMW was used to obtain the DMW and to calculate RGR. Based on DMW values obtained for clone 61, was found that the formulation of Basic medium (DMW = 0.38 g) was the most efficient. For clone 62, the most responsive medium was M4 (DMW = 0.47 g) and to clone 68, M3 (DMW = 0.71 g) was the highlighted medium. As the RGR, it was found no statistically significant difference for any of the six culture media taking into account the three clones.
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Alcântara, Berenice Kussumoto de. "Caracterização da diversidade genética de Teca (Tectona grandis) de diferentes procedências usando marcadores microssatélites." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/11/11137/tde-19022010-083541/.
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A teca (Tectona grandis) é uma das principais espécies madeireiras do mundo, com alto valor econômico, muito famosa por sua beleza, resistência e durabilidade. A espécie ocorre naturalmente na Índia, Mianmar, Tailândia, Laos e Indonésia, onde estudos de diversidade têm sido realizados no que tange à conservação de recursos genéticos. Entretanto, existe a necessidade de estudos de diversidade genética de teca no Brasil que poderiam ser utilizados, principalmente, para a proteção de cultivares e para o melhoramento genético. Visto isso, o objetivo deste trabalho foi caracterizar a diversidade genética de genótipos de teca utilizados nos plantios brasileiros. Para tanto foram testados 10 primers de microssatélites, obtidos na literatura, para a avaliação de 60 genótipos, 33 provenientes de sementes de plantios de teca em Cáceres, 14 correspondentes a clones obtidos em Cáceres e 13 genótipos referentes a clones de procedências fora do Brasil, sendo estas, Honduras, Malásia, Índia, Indonésia, Costa do Marfim e Ilhas Salomão. Os genótipos foram divididos em oito grupos, de acordo com sua procedência, para a análise da diversidade genética. Foram realizadas análises multivariadas pelo método bayesiano no programa STRUCTURE, análises de agrupamento e coordenadas principais. Dos 10 primers testados, nove se mostraram polimórficos, sendo então utilizados para as análises estatísticas. Elevada variabilidade genética para os genótipos de teca foi detectada, sendo o número médio de alelos por loco igual a 5,22. Os genótipos de Cáceres apresentaram 100% de polimorfismo, seguido pelos clones da Índia com 90% de polimorfismo. A heterozigosidade média observada ( o= 0,352) foi menor que a heterozigosidade média esperada ( e =0,443). Coerentemente com outros estudos em teca, a maior parte da variabilidade genética concentrou-se dentro dos grupos (Hs = 0,436). Com as análises do programa STRUCTURE foi possível definir a divisão dos genótipos em três grupos, sendo 73,4% dispostos em um único grupo (vermelho) representado pela maioria dos genótipos de Cáceres, 13,3% alocados no grupo verde compostos por alguns clones da Índia, Ilhas Salomão, um clone da Malásia, um de Honduras e os clones da Costa do Marfim e os 13,3% dos genótipos restantes possuíram uma mistura dos dois grupos (vermelho e verde). A análise de agrupamento, utilizando índice de Jaccard, indicou a separação dos genótipos em seis grupos distintos: grupo I pertencente ao clone da Indonésia, grupo II possuindo dois clones da Índia, grupo III com os genótipos de Cáceres e dois clones de fora (um da Índia e outro da Malásia), grupo IV possuindo os genótipos de Honduras e Malásia, grupo V com clones da Índia e grupo VI pertencente aos clones da Costa do Marfim e das Ilhas Salomão, sendo coerente com a análise de coordenadas principais. Através do agrupamento utilizando distância de Nei, foi possível inferir duas possíveis origens da teca implantada no Brasil: Malásia e Índia. Após a avaliação das divergências genéticas, sugestões são feitas no que tange a utilização de genótipos contrastantes para o uso como parentais em programas de melhoramento genético.<br>Teak (Tectona grandis) is one of the main timber species in the world with high economic value, famous for its beauty, strength and durability. The species occurs naturally in India, Myanmar, Thailand, Laos and Indonesia, where diversity studies have been conducted with regard to the conservation of genetic resources. However, there is a need for studies of genetic diversity of teak in Brazil that could be used mainly for the protection of plant varieties and for breeding. Therefore, the objective of this study was to characterize the genetic diversity of teak genotypes used in Brazilian plantations. We tested 10 microsatellite primers, obtained in the literature, to assess 60 teak genotypes, 33 genotypes from seeds of plantations in Caceres, 14 clones obtained in Caceres and 13 clones originated from Honduras, Malaysia, India, Indonesia, Ivory Coast and Solomon Islands. The genotypes were divided in eight groups, in accordance to its origin, for the genetic diversity analysis. Multivariate analysis were conducted using the Bayesian method implemented in the program STRUCTURE, as well as cluster and principal coordinates analysis. Of the 10 primers tested, 9 showed polymorphism, and were then used for statistical analysis. High genetic variability for the teak genotypes was detected, with the average number of alleles per locus equal to 5.22. Caceres genotypes showed 100% polymorphism, followed by the clones from India with 90% polymorphism. The average observed heterozygosity ( o = 0.352) was lower than the average expected heterozygosity ( e = 0.443). Consistent with other studies in teak, most of the genetic variability was concentrated within groups (Hs = 0.436). With the analysis of the STRUCTURE software it was possible to define the division of the genotypes into three groups, 73.4% placed in one group (red) represented the majority of the genotypes of Caceres, and 13.3% allocated in the green group composed of some clones from India, a clone from Solomon Islands, Malaysia and Honduras and the clones of the Ivory Coast. The 13.3% of the remaining genotypes possessed a mixture of the two groups (red and green). Cluster analysis using Jaccard index indicated the separation of the genotypes into six distinct groups: group I belonging to the clone from Indonesia, group II having two clones from India, group III with genotypes from Caceres and two clones from India and Malaysia, group IV having the Honduras and Malaysia genotypes, group V with clones from India and group VI with clones belonging to the Ivory Coast and the Solomon Islands. This result was consistent with the principal coordinate analysis. From the results described above, together with the cluster analysis using Neis distance, it was possible to infer two probable origins of teak implemented in Brazil: India and Malaysia. After assessing the genetic divergences, suggestions were made concerning the use of contrasting genotypes as parents in breeding programs.
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Amponsah, Isaac G. "Forest soil characteristics and variability under teak, Tectona grandis Linn. F, plantations and natural forests in Ashanti Region, Ghana." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0023/MQ52036.pdf.
Full textBooks on the topic "Tectona grandis (Teak)"
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Ansari, S. A. Macropropagation of teak: Tectona grandis. Tropical Forest Research Institute, 2003.
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Tewari, D. N. A monograph on teak (Tectona grandis Linn.f.). International Book Distributors, 1992.
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Weaver, Peter L. Tectona grandis L. f., Teak: Verbenaceae, verbena family. International Institute of Tropical Forestry, U.S. Dept. of Agriculture, Forest Service, 1993.
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N, Sarojam, and Kerala Forest Research Institute, eds. An annotated bibliography on teak: Tectona grandis Linn. f. Kerala Forest Research Institute, 2005.
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Aswin, Sathyanarayanan, Selvi Pandiyan Ranjithkumar, and Selvaraju Sivamani. "Modelling and Simulation of Pyrolysis of Teak (Tectona Grandis) Sawdust." In Clean Energy Production Technologies. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-13-8637-4_12.
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Suryatmojo, Hatma, and M. Ali Imron. "Hydrological Processes in Different Types of Teak (Tectona grandis L.) Plantation." In Sustainable Future for Human Security. Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-5430-3_2.
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Lestari, Puji, Handojo H. Nurjanto, and Listianti. "Effect of Nitrogen (N) Concentration on the Morphology of Teak (Tectona grandis) Seedlings." In Proceeding of the 2nd International Conference on Tropical Agriculture. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97553-5_26.
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Sinha, Satish Kumar, R. Vijendra Rao, T. S. Rathore, and H. P. Borgaonkar. "Growth Ring Structure and Specific Gravity Variation in Juvenile and Mature Wood of Natural-Grown Teak (Tectona grandis L.f.)." In Wood is Good. Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-3115-1_11.
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Parthasarathy, S., G. Thiribhuvanamala, P. Muthulakshmi, and K. Angappan. "Diseases of Tectonia grandis (Teak)." In Diseases of Forest Trees and their Management. CRC Press, 2021. http://dx.doi.org/10.1201/9781003173861-50.
Full textConference papers on the topic "Tectona grandis (Teak)"
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Fakhrurozi, Nani Husien, Erwin, Sri Wahyuni, and Agus Sulistyo Budi. "The Existence of Reaction Wood on Branch of Teak Wood (Tectona grandis Linn. F) (Macroscopical Characteristics)." In Joint Symposium on Tropical Studies (JSTS-19). Atlantis Press, 2021. http://dx.doi.org/10.2991/absr.k.210408.023.
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